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all that is solid melts into air, all that is holy is profaned

Bt-Oblivious Bad Bug Blow Back

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A detailed survey of 481 cotton growers in China found that, although they did use fewer pesticides in the first few years of adopting GM plants, after seven years they had to use just as much pesticide as they did with conventional crops.

The five million Chinese GM cotton farmers appear to have created a natural vacuum by growing cotton genetically engineered to kill the bollworm larvae which used to destroy their plants. With the bollworm larvae gone, other pests called mirids have taken over, forcing farmers to eradicate them with lashings of expensive insecticide that have all but destroyed the original economic benefits.

The study — the first to look at the longer-term economic impact of Bt cotton — found that by year three, farmers in the survey who had planted Bt cotton cut pesticide use by more than 70 percent and had earnings 36 percent higher than farmers planting conventional cotton. By 2004, however, they had to spray just as much as conventional farmers, which resulted in a net average income of 8 percent less than conventional cotton farmers because Bt seed is triple the cost of conventional seed.

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